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[–] aeschynanthus 0 points 11 points (+11|-0) ago 

Solar Dynamics Observatory tells how it is!

A small, but complex mass of plasma gyrated and spun about over the course of 40 hours above the surface of the Sun (Sept. 1-3, 2015). It was stretched and pulled back and forth by powerful magnetic forces but not ripped apart in this sequence. The temperature of the ionized iron particles observed in this extreme ultraviolet wavelength of light was about 2.8 million degrees C.

"Small" in relation to the Sun's actual size, that is.

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[–] carlip 2 points 1 points (+3|-2) ago 

It should be noted that a wavelength is not measured in degrees.

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[–] KillerMech 0 points 7 points (+7|-0) ago 

They are saying the wavelength that the light is seen in is ultraviolet, that the ionized iron particles are 2.8 million degrees Celsius.

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[–] aeschynanthus 0 points 2 points (+2|-0) ago 

As KillerMech said, there's an embedded clause ("observed in this extreme ultraviolet wavelength of light") inside "The temperature of the ionized iron particles ... was about 2.8 million degrees C".